Determining Which of the Following Would Be Most Helpful in Understanding

question 19

Multiple Choice

Determining which of the following would be most helpful in understanding the structure of an ecological community?

• A) which and how many species are present overall
• B) which particular species are absent
• C) the kinds of interactions that occur among individuals of the same species
• D) the abundance of resources available for one species

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Definitions:

Rods

Sensory receptors in the retina that detect light waves and transduce them into signals that are processed in the brain as vision. Rods respond best to low levels of illumination, and therefore they do not support color vision or seeing fine detail.

Transduction

The process of converting one form of energy into another. In sensory systems, it refers to the conversion of external stimuli into nerve signals.

Sensory Adaptation

The process by which sensory receptors become less responsive to constant stimuli, allowing individuals to ignore background levels of stimulation.

Absolute Threshold

The smallest level of stimulus that can be detected by a sense, such as the faintest sound that can be identified.